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1905
First school museum was established in St. Louis.  School museum's were known as central administrative units where people were able to collectively go and use different materials to help advance their learning.

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1910
Instructional film, stereographs, magic lanterns, and motion picture projection were the basis of this era and first big advancements from a teacher, chalk, and chalkboard.

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1930's
Many enthusiasts were sure that radio broadcast and audiovisual would be the next great thing to take education to the next level. Audiovisual didn't end up playing as large of a part as anticipated but more lead the way to television.

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1952
In 1952, 242 channels were set aside for educational public broadcasting.

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1980's
After the invention of the computer, shortly after can the microcomputer. The microcomputer was a just a smaller more compact version on the computer that was less expensive. By 1983 they were being used in schools for instructional purposes.